Binding-post.



J. W. EEERRER.

BINDING POST.

APPLICATION FILED JUNE 4, 1907. RENEWED JUNE 30, 1908.

Patented Feb, 9, 1909.

6 e a 0 a 1 1 being shown in side e evation.

ll llltlli) Sikh ES PATENT UFFIGE.

JAMES W. FEEHRER, OF BOSTON, MASSACHUSETTS, ASL

'ro Josnrn n. srnosns, or'

BOSTOS, MASSACH i 5" BINDING-PO81.

Application filed June 4, 1907, Serial No. 377,211.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Renewed June 30, 1908. Serial No. 441,260.

This invention relates to new and useful improvements in binding postsand it has particular reference to a binding post includint. resilientlyengaged members for holding the wire contact piece. i

In conneclirni with a device of the above type the invention has for itsobject to provide a binding post comprising as an entirety a springpressed siidable nut surroundins; the post proper and novel meanscoecting therewith for holding the wire contact piece.

The deteii's of construction will appear in the course of the followingdescription. in which reference is bad to the accompanying drawingsforming a part of this SDOClllCiltion, like characters of referencedesignetirn: similar parts throughout the severnlviews wherein lfiquri-s1 is 21 side elevation of :1 binding post constructed in accordance withthe present invention and showiin: it cs arbitrarily applied to n sparkplus. F131. 2 is a. central iong'itudinzil section of such binding postthe clamping lever and the spark plug Fig. 3 is e dctniod perspectiveview of the post and its cssocieted parts. Fig. 4 is n pl an view of thewire contact member surrounding the bindin; post and clamped thereupon.The invention is arbitrarily shown as eplied to a s ark plug but thisdisclosureis to be regarded in the light of example rather than ofenumeration, and it will be understood that the invention may be used inany connection in which the binding posts are employed. Referringspecifically to the accompanying drawings. the numeral 1 designates aspark plug proper which is secured in the cylinder head of an explosiveengine and which is formed on its u per end with an exielly projectingthreade post 2. The binding post embodied in the present inventioncomprises a set nut 3, the central opening of which communicates withthe tin-ended bore. of a tubular member 4, which is threaded upon thepost 2. 'l he member 4 is formed at its upper end with extended ears orbifurcations 6, which receive therethrough, c pin 7, constituting thepivot for a cam lever 8, lni\'-' ing a. straight edge 9. The member 4has n. smooth circumferential surface to permit of the free slidingmovement of a binding collar 10 surrounding the same and forced upwardlyby an expensive coil spring 11 which surrounds the member 4 between thecollar 10 and the nut 3 and which bears thereegeinst. The contact wirefrom the megneto or other source of electrical supply terminates in acontact piece 13 having a central opening 14 which surrounds the member4 and is interposed between the lever 8 and the collar 10. It is obviousthat the contact iece 13 may be of any other conventional orm instead ofthe embodiment arbitrarily shown. For the purpose of centering thecollar 10, the letter is formed on its underneath surface with aconcentric recess 15 which affords it sent for the spring 11.

in use the contact piece 13 is frictionclly held between the straightface 9 of the lever 8 and thc'upper surface of the collar 10. The

. adjustment of such contact piece is made by raising the lever S to thevertical dotted line position of Fig. 1 at which time the contact piece13 may be assembled or disassembled with relation to the spark plug bymoving the some upon the lever 8. A binding post constructed inaccordance with the present invention is exceedingly simple ii;construction, inexpensive to manufacture and practical and cllicicnt inuse.

From the foregoing description it will be seen that simple and ellicientmeans are provided for accomplishing the cbjccts ol' the invention, but.while the elements lmrcinshown and described, are well adapted to servethe functions set forth, it is obvious that various minor changes nniybe nnulc in'the proportions, shape and arrangement of the several parts,without departing from the spirit and scope of the invention as definedin the eppended claim.

What is claimed is: In a device of the type setforth, the combinationwith a. threaded post of a. set nut rounding said tubular member andbearing threaded u onsaid post and provided with a I against saidcollar, and said set nut.

central tu ular member surrounding said 1 In testimony whereof, I afiixmy signapost, said tubular memberhaving parallel ture, in presence oftwo witnesses.

ears at its upper end, a clamping lever piv- JAMES W. FEERRER. otedbetween said ears and having a straight face, a collar looselysurrounding said tubular member, and an expansive coil spring suriWitnesses:

CHARLES S. ENSIGN, Jr., GEORGE M. POLAND.

